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cowpox protects from smallpox latin cow = vacca -> vaccine |
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made vaccine against pasteurella multocida |
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attenuated live inactivated (killed), whole or subunit toxoid |
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AKA modifies live vaccines pathogens are living but have reduced virulence immune response is from TH1 and cytotoxic T cells |
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3 ways: raised in tissue culture cells that they aren't used to, so they give up their ability to cause disease culture under unusual conditions manipulate genes |
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stimulates a strong immune response-> last a long time people with the vaccine can infect other ppl -> herd immunity |
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can cause mild infections pregnant women and immunosuppressed ppl can't get them vaccines can mutate back to virulent or wild form |
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can be whole dead pathogens of parts of pathogens with antigen on them formaldehyde is used to deactivate them starts TH2 response -> antibody-mediated immunity |
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safer than live vaccine- cannot replicate or mutate |
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no herd immunity whole agents can start inflammation microbes don't reproduce -> weak immune response need multiple doses or adjuvant to make it more effective |
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toxins that are modified by heat or chemicals good for some bacterial diseases start antibody-mediated immunity don't replicate -> need multiple doses |
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give pre-formed antibodies to patient used for quick protection give patient antiserum |
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contains antibodies from a person or animal that has had the disease can also pass other viruses and antibodies to thing we don't need can cause allergic reation |
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combination of antiserum with plasma cancer cell make monoclonal antibodies alternative to antiserum |
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study and diagnostic use of antigen-antibody interactions in blood |
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precipitation tests Agglutination tests Neutralization tests labeled antibody tests |
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easy works because antigens and antibody mixed in the right proportions precipitate |
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used to measure how much antibody/immunoglobulin is in serum how: make anti-antibodies by putting antibodies into another species |
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improves resolution of immunodiffusion test mostly used to show an absence or excess of a certain antigen |
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what is the biggest difference between the agglutination and precipitation tests? |
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in the agglutination test, insoluble particles clump together |
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what is an example of an agglutination test? |
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neutralization tests 2 types |
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viral neutralization viral hemagglutination inhibition test |
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useful for viruses that kill cells virus and blood mixed in culture. If cells don't die, then the person has antibodies against it and are immune. |
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Viral Hemagglutination inhibition test |
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useful for viruses that clump cells instead of killing them. if serum mixed with virus don't clump, then there is an antibody for the virus that stops it from clumping the RBCs used for flu, measles, mumps |
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use antibodies with labels so you can detect them 3 examples: fluorescent antibody tests ELISA Western Blot test |
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fluorescent antibody test |
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use fluor. dyes as labels dyes antibody without affecting its ability to bind antigen can be direct or indirect |
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direct fluorescent antibody test |
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used to identify if bacteria is in patient attach marker onto antibody let bind to antigen see if glows not a quantitative test |
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Indirect fluorescent antibody test |
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same as direct but use 2 antibodies: one tagged, one not tagged. |
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enzyme-linked immunosorbent assay checks for presence of antibody or antigen the enzyme is the label quantitative |
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detects multiple types of antibodies |
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rapid tagged antigen linked to color on a porous strip used in pregnancy tests |
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